Selective signaling device.



J. P. C. BOSWAU.

SELECTIVE SIGNALING DEViCE. ARPLICATION FILED JULY 10, 1.913.

1,163,883, Patented Dec. 14, 1915 Wi/nesses: /n venfor: &/. Johannes PC. Boswqu.

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J'OHANN ES P. C. BOSWAU, OF NEW YORK,

N. 521, ASSIGNQR TO WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

SELECTIVE SIGNALING DEVICE.

Specification of Letters Patent.

Patented Dec. ML, 1915..

Application filed July 10, 1913. Serial No. 778,323.

State of New York, have invented a certain new and useful Improvementin Selective Si aling Devices, of which-the, following is a ull, clear, concise, and exact description.

This invention relates to selective signaling devices and more particularly to a stepby-step signaling device adapted, in response to a certain predetermined character and combination of current impulses, to close asignaling circuit. i g The object of this invention is to provide a selective device of this character which may be associated with a circuit, such for example as a telegraph line, over which imv.pulses of various characters are being sent at frequent intervals, and which will not be selectively operated by any of thevarious combinations of impulses employed in the transmission of the telegraph messages.

1 In a selective signaling device embodying this invention there is provided a pair of actuating magnets and a circuit closing mechanism operated by the magnets.

One of the features of this invention is the novel meansprovided for controlling a time interval between\ the time of closing the circuit in which the device is connected and a time when it is conditioned for closing a contact, and consists in the provision of means responsive Ito continuous current for advancing said circuit closing mechanism to an intermediate predetermined position and responsive to current impulses for subsequently advancing said circuit closing mechanism to operative position.

Other features of the invention are the details of construction and combination of parts as will hereinafter more fully appear.

In the drawings illustrating this inventionFigure1 is a view in side elevation, with parts broken away, of a selective signaling device embodying this invention; Fig. 2 is a plan view of the circuit closing mechanism; Fig. 3 shows, the position of the contact springs when the ratchet wheel is in four different stages of advancement as follows: (A) the normal position of the' springs, (B) the position of the springs with the magnets energized in response to continuous current, (C) the position of the springs with the circuit closing mechanism advanced to the predetermined intermediate position, (D) the position of the. springs with the circuit closing mechanism advanced to operative position; and Fig. 4 is a diagrammatic View of the circuit closing mechanism and circuit of a selective signalmg device embodying this invention.

Referring now to the drawings, and particularly to'Fig. l, the numeral 5 designates a base to which is secured an inverted U- shape frame 6. Suspended within the frame 6 are two electromagnets 7 and 8 hereinafter referred to as the stepping and holding magnets respectively. The stepping magnet 7 has one set of windings 9, while the holding magnet 8 has two sets of windings designated 10 and 11, the purpose of which will be hereinafter explained. Pivotally supported beneath the magnets 7 and 8 are armatures 15 and 16 carrying integrally formed arms 17 and 18 extending at right angles to the armatures and along the side .of the frame 6. Mounted upon the arm 17 is an extension 19 carrying at its upper end a springpressed pawl 20, pivoted thereto at 13. Upon the arm 18 is mounted a plurality of arms 21 and 22. The arm 21 is normally in engagement with a tail-piece 12 of the pawl 20. The arm 22 is normally in engagement with a tail-piece 14 of a pawl 23, pivotally mounted upon an auxiliary U- shape frame 24- carried by the main frame 6. The armature 15 is normally retained in its inoperated position by means of a spring 25 secured at one end to the extension 19 and at its other end to an adjustable arm 26 secured to the frame 6. The armature 16 is normally retained in its inoperated position by means of a spring 27 secured at one end to an'extension 29 of the arm 18 and at its other end to an adjustable arm 30 cured to the frame 6. A spring 28 is connected at its inner end with the pawl 23 and at its outer end to an adjustable arm 31 searmatures 1.5 and 16 is determined bylocking set screws and 41 carried by sup ports 42-42 secured to the members of the frame 6, As shown, the set screw 40 ism position toengage a beveled portion of the lower face of the corresponding armature, while the set screw 41 is adapted to 'engage the upper face of the corresponding arma- 'tule. v v

The-auxiliary U-sha'pe frame 24 having 7 [legs 43 and 44 is mounted upon the side of the frame 6. Mounted between the legs 43 and 44is a rotatable shaft 50. The rotatable shaft carries a ratchet wheel 51, in position to be engaged by the pawls 20 and 23, hereinafter. designated as the stepp ng and holding pawls respectively. -Ad ustab1y mounted on the shaft 50 isa cam disk 52, preferably of insulating material, in posltion to be engaged by the extension 37 of the contact spring 34. A contact carrying member 53 carrying at its outer end a contact 54 1s also adjustably mounted on the rotatableshaft 50. Secured to the shaft 50 near its inner end is a coil spring 55 adaptedfito The cam disk 52 and the contact carrying member 53 are capable of adjustment with respect to the ratchet wheel 51 and with respect to each other. Ordinarily the raised portion of the cam disk 52 is in such position that the time interval between the closing of the line circuit and a time when the device is conditioned for closing its contacts 35, a4 is of suflicient duration to permit of the sending over the line, circuit the longest impulses used in the transmission of telegraph messages without bringing, the circuit closing mechanism to a conditioning position. To bring the circuit closing mechanism to opera tive position, continuous current, or an impulse longer than any impulse used in the transmission of telegraph messages, must first be sent over the line and thereafter the required number of short impulses corresponding to the position of the contact carrying arm 53'witl1 respect to the cam disk 52 must be sent.

Referring now to the operation of the device, it will be assumed that the terminals 59 and 60 of the device are connected to the line wires of a circuit such, for example, as a telegraph circuit which is normally open. The signal receiving apparatus (not shown) to be operated is connected to the terminals 59 and 61. Closure of the line circuit and impressing continuous current or a long current impulse thereon will close a circuit throughterminal 59, windings 9 and 11 and terminal 60, energizing the stepping and holding magnets7 and 8. The armatures 15 and 16 will be attracted, causing engagement of the stepping and holding pawls 20 and 23 with the ratchet wheel 51, and advancing it one step in the direction of the arrows in Figs. 3 and 4. Attraction of armature 15 also moves extension 19 to the right. Due

to its resiliency the contact spring 34 will follow extension 19 and will engage contact spring 35, thereby short circuiting the winding 9. The stepping magnet 7 is thereby deenergized causing its armature 15 to fall back, breaking contacts 34, 35, removing the short circuit from winding 9 and permitting energization of the stepping magnet 7. Each time the stepping magnet 7 is energized, the

\ ratchet-wheel 51 is advanced one step in the direction of the arrows in Figs. 3 and 4.

With continuous current or a long impulse on the line and through the device, the cycles of energizationand denergization of the stepping magnet 7 will continue until the ratchet wheel 51 has been advanced to a position to permit of the engagement of the extension 37 of the contact spring 34 with the raised portion of the cam disk 52. Engagemerit of the extension 37 and the raised portion of the cam disk 52 causes contact to be made between springs 33 and 34 and prevents the closure of contacts 34 and 35 and the consequent short circuiting of the winding 9 Further advancement of the ratchet wheel 51 is thereby prevented while continuouscfl'rrent or the long impulse is on the line. The closing of contacts 33 and 34 shor't'circuits winding 10 of the holding magnet 8, thereby rendering it slow releasing. To advance the circuit closing mechanism from the predetermined intermediate position to operative position, it is now necessary to impress upon the line the required number of short impulses. The sending of these short impulses opens and closes a circuit through the winding f the stepping magnet 7 and the winding 11 of the holding magnet 8. Since the holding magnet 8 is now slow releasing, due to the winding 10 thereof being short circuited, as hereinbefore described, the armature 16 will be held up during the period between impulses, while the armature 15 will fall back, moving with it the extension 19 and the stepping pawl 20. The closure of the line circuit for the sending of the short impulse will then cause, energization of the magnets and the engagement of the stepping pawl 20 with the ratchet wheel 51, thereby advancing said ratchet wheel one step. Upon the closure of contacts'35, 54 a circuit through the signal receiving apparatus is closed, permitting operation thereof.

What is claimed is:

1. In a selective signaling device, stepmesses by-step circuit closing mechanism, and stepping and holding magnets responsive to continuous current for advancing said circuit closing mechanism to an intermediate predetermined position and responsive to current impulses for subsequently advancing said circuit closing mechanism to operative position. I

2. In a selective signaling device, a stepby-step circuit closing mechanism, stepping and holding magnets for advancing said circuit closing mechanism, and means under the joint control of said stepping and holding magnets and said circuitclosing mechanism for determining the character of currentrequired to advance said circuit closing mechanism to operative position.

in a selective signaling device, a stepby-step circuit closing mechanism, stepping and holding magnets for advancing said circuit closing mechanism to a predetermined position in response to continuous current and thereafter to operative position in response to current impulses, and means cooperating With said stepping and holding magnets for determining the character of current for advancing said circuit closing mechanism.

l. In a selective signaling device, a stepby-step circuit closing mechanism, stepping and holding magnets therefor, and'means for causing said stepping magnet'to advance said circuit closing mechanism to a predetermined intermediate position in response to continuous current and thereafter to operative position in response to current impulses.

5. in a selective signaling device, a rota- .table ratchet Wheel, stepping and holding pawls therefor, a cam and a contact carrying member moving with said ratchet Wheel, contact springs, and stepping and holding magnets-- coiiperating With said contact springs and said cam in response to continue one current to advance said contact carrying member a predetermined position and thereafter operative position in response to current impulses.

i. a selective signaling device, a rotamole ratchet Wheel, stepping holding pa vls theretcr, a cam dict: and a contact carrying member moving said ratchet Wheel, ste drag and magnets for y *n I W 1 actuating said stepp and hold- I said stepping magnet responsive to continuous current for advancing said contact carrying member to a position determined by said cam disk, and contact springs controlled by said cam disk for thereafter rendering said stepping magnet responsive to current impulses for advancing said contact carrying member to operative position.

7. In a selective signaling device, a rotatable ratchet Wheel, stepping and holding pavvls therefor, a cam and a contact carrying member moving with said ratchet Wheel, a plurality of contact springs, an extension for one of said springs, and stepping and holding magnets cotiperating with said springs to advance said contact carrying member to a position determined by engagement of said cam and said extension in response to continuous current, engagement of said cam and said extension rendering said magnets responsive to current impulses for advancing said contact carrying member to operative position.

8. ln a signaling device, a step-by-step circuit closing "mechanism, stepping and holding magnets for advancing said circuit closing mechanism to a predetermined position in response to continuous current, and means for thereafter rendering said stepping magnet responsive to current impulses.

9. "in a signaling device, a rotatable ratchet Wheel, stepping andhelding pavvls therefor, a cam disk moving with said ratchet Wheel, and stepping and holding magnets responsive to continuous current controlling said pawls in advancing said ratchet Wheel to a position determined by said cam disk.

10. in a signaling device, a step by-step circuit closing mechanism, stepping and holding magnets responsive to continuous current for advancing said circuit closing mechanism, and means carried thereby for stopping said mechanism at a predetermined position, said means causing said holding magnet to hold said circuit closing mechanism in the predetermined position.

in Witness whereof, h r unto subscribe my this 7th day oi uly 19135.

li itnesses Anion r,

Lanna l) 

